package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.context.BaseContext;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    // 微信服务接口
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private RedisTemplate redisTemplate;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        // 调用微信接口服务，获取微信用户信息
        String openid = getOpenid(userLoginDTO.getCode());
        if (openid != null) {
            // 登录成功
            // 根据openid查询当前用户是否为新用户
            User user = userMapper.getByOpenid(openid);
            if (user == null) {
                // 如果是,新用户, 自动完成注册
                user = User.builder()
                        .openid(openid)
                        .build();
                userMapper.insert(user);
            }

            return user;
        } else {
            throw new RuntimeException("登录失败");
        }
    }

    @Override
    public Long getCurrentUserId() {
        String key = "userId";
        return (Long) redisTemplate.opsForValue().get(key);
    }

    @Override
    public User getById(Long userId) {
        return userMapper.getById(userId);
    }

    // 获取openid
    private String getOpenid(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject.getString("openid");
    }
}
